Is your ZIP code polluted?

Living near environmental hazards — like busy freeways, contaminated patches of land and fields with pesticides — can result in health consequences such as asthma and low infant birth-weight. People who are poor and of certain racial and ethnic backgrounds are often especially vulnerable to these risk factors.

On Tuesday, California released a map that aggregated a ton of data to identify the state’s most heavily polluted communities. Nine of them are in the Bay Area, including Oakland and Richmond.